My LCD screen does not stay straight. I removed the screw and re-tighten but to no avail. Seems there is a spring or some part that tightens the LCD to stay straight and not tilt down. Would anybody have the parts manual thinking it might be a part?

You can view exploded diagrams of your camera and parts lists here:

https://servicesplus.us.sony.biz/sony-parts.aspx

Sorry, it isn't possible to link directly to pages within that site, but just enter your model number in the "parts finder field" on the left (use the full model number without any spaces or dashes, such as HVRZ1U) then click through the appropriate links until you find the diagram of the screen assembly.

You don't mention whether you have an FX1 or Z1 though. This site is only for Sony's pro products (like the Z1, V1 and A1 for example). Not sure if there's something similar for the consumer cameras like the FX1, I've never seen it if there is.